James Holmes, the gunman in the Colorado movie massacre, could face the death penalty after jurors found on Monday that aggravating factors in the case counted for more than mitigating ones such as mental illness.

After deliberating for less than half a day, the panel of nine women and three men said they had concluded unanimously that the aggravating factors outweighed the mitigating ones. If just one juror had found that they did not, the 27-year-old Holmes would have received a life sentence with no chance of parole.